Pengchao Wu, Pengliang Sui, Guiping Peng, Zichao Sun, Fan Liu, Wenqian Yao, Haibao Jin, Shaoliang Lin

Designable Photo‐Responsive Micron‐Scale Ultrathin Peptoid Nanobelts for Enhanced Performance on Hydrogen Evolution Reaction

  • Mechanical Engineering
  • Mechanics of Materials
  • General Materials Science

AbstractThe development of high‐reactive single atom catalysts (SACs) based on long‐range‐ordered ultrathin organic nanomaterials (i.e., below 3 nm) provides a significant tactic for the advancement in hydrogen evolution reactions (HER), but remains challenging. Herein, photo‐responsive ultrathin peptoid nanobelts (UTPNBs) with a thickness of ∼2.2 nm and micron‐scaled length were generated using the self‐assembly of azobenzene‐containing amphiphilic ternary alternating peptoids. The pendants hydrophobic conjugate stacking mechanism revealed the formation of one‐dimensional ultralong UTPNBs, whose thickness was dictated by the length of side groups that are linked to peptoid backbones. The photo‐responsive feature was demonstrated by a reversible morphological transformation from UTPNBs to nanospheres (21.5 nm) upon alternative irradiation with UV and visible lights. Furthermore, the electrocatalyst performance of these aggregates co‐decorated with nitrogen‐rich ligand of terpyridine (TE) and uniformly‐distributed atomic platinum (Pt) was evaluated toward HER, with a photo‐controllable electrocatalyst activity that highly depended on both the presence of Pt element and structural characteristic of substrates. The Pt‐based SACs using TE‐modified UTPNBs as support exhibited a favorable electrocatalytic capacity with an overpotential of ∼28 mV at a current density of 10 mA cm−2. Our work presented a promising strategy to fabricate stimuli‐responsive ultrathin organic nanomaterials‐based catalysts with controllable HER catalytic performance.This article is protected by copyright. All rights reserved

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